A gaming monitor’s power use is best measured model by model, not with a universal “gaming monitors use X watts” rule. Current 27-inch gaming displays can sit around 30–50W in ordinary operation, while maximum ratings can be much higher because they cover worst-case operation, HDR, USB power and other loads.
For example, Dell lists the 27-inch 4K QD-OLED Alienware AW2725Q at 39.4W operating power but 190W maximum. LG lists the 27-inch 4K 144Hz UltraGear 27GR93U at 50W typical and 55W maximum.
Watts vs kilowatt-hours
Watts (W) are the rate of power use right now.
Kilowatt-hours (kWh) are the energy your electricity provider bills over time.
The cost formula is:
cost = (watts ÷ 1000) × hours used × electricity price per kWh
Example: a 50W monitor used for five hours consumes 0.25kWh. At $0.30/kWh, that session costs $0.075.
Do not confuse maximum power with normal consumption
This is one of the easiest specification mistakes to make.
Dell’s AW2725Q is rated at 39.4W operating power and 190W maximum. The 190W figure is not evidence that it normally draws 190W while gaming.
See Dell’s current AW2725Q power specifications.
Real gaming-monitor examples
| Monitor | Published operating/typical power | Published maximum |
|---|---|---|
| Alienware AW2725Q, 27-inch 4K QD-OLED | 39.4W | 190W |
| LG UltraGear 27GR93U, 27-inch 4K 144Hz IPS | 50W typical | 55W |
Those two specifications alone show why blanket ranges can mislead.
See LG’s 27GR93U power specifications.
What actually changes monitor power use?
Brightness
On an LCD, backlight brightness is often one of the biggest user-controlled factors. Lowering an unnecessarily bright display can reduce power draw.
OLED content
OLED pixels produce their own light. Dark scenes can use less panel power than very bright, high-average-picture-level content. That makes OLED consumption more content-dependent than a conventional LCD backlight.
HDR and peak brightness
HDR can raise consumption when the monitor drives brighter highlights or a larger bright area, but there is no universal rule that HDR “doubles” power use. The result depends on the monitor and content.
Refresh rate
A higher refresh rate can increase monitor electronics power and can also change the PC’s power use, especially when the GPU renders more frames. The size of that change is model- and workload-specific.
Does 4K automatically use more monitor power than 1080p?
No. Higher resolution makes the GPU work harder when rendering the same game settings, but the monitor’s own wall power depends on panel size, backlight/OLED behaviour, brightness, electronics and design.
A well-designed 4K monitor can use less power than a larger or brighter lower-resolution model.
Your monitor does not normally affect PC PSU sizing
A normal desktop monitor plugs into the wall through its own power supply. Its 40–100W consumption is therefore not drawn through the gaming PC’s PSU.
The exception is unusual setups where one device powers another over USB-C. For a conventional desktop gaming setup, size the PC power supply for the components inside the PC, not for the external monitor.
How to find your monitor’s actual consumption
- Look for typical/operating power on the manufacturer’s specification page.
- Check ENERGY STAR or regional energy labels when available.
- For your real setup, plug the monitor into a wall power meter or energy-monitoring smart plug.
- Measure at your normal brightness and refresh rate, not only at default settings.
How to reduce gaming-monitor power use
- Use a comfortable brightness rather than maximum brightness by habit.
- Allow the display to sleep automatically when idle.
- Turn off decorative RGB if you do not want it.
- Use HDR only when you actually want HDR.
- If power matters more than maximum smoothness for a particular task, a lower refresh rate may reduce total system power on some setups.
What matters most for your electricity bill?
Gaming PCs normally use far more power than their monitor under load. If your goal is reducing total gaming energy, GPU efficiency, frame-rate limits and game settings often matter more than shaving a few watts from the display.
Our GPU efficiency calculator can help compare FPS per watt and running cost.
Quick answer
Expect many ordinary gaming monitors to consume a few dozen watts in normal use, but check the exact model rather than relying on a generic range. Use its operating/typical figure for estimates, not the maximum label, and measure at the wall if you want the real number for your settings.
